Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d72ee50088e613…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 22:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48e3aad017d31e2ef12daa49bb5ac2f9 SHA-1: 006dc5ff8e137e22e49ee5e15465585506216401 SHA-256: e6d72ee50088e613da31af6cb74e168935e90ad17cd2b8e126609925287b0856
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a malicious redirector link disguised as a download lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link points to known malicious infrastructure. The presence of a visual download button and the document body text referencing 'Mad max font' suggest a social engineering tactic to entice users to click the link. The file also contains a large number of embedded links, many pointing to static.usrfiles.com, which is likely part of a link farm to improve SEO for the malicious redirector.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=mad+max+font
    • https://static.usrfiles.com/ugd/b8c837_a86d8827fcc54690a3be15e679b07105.pdf
    • https://static.usrfiles.com/ugd/4dd980_769b9479ff5b45bd974cbfc090df0212.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_f401b7aae0fb4d1dab9d5b14fb27f401.pdf
    • https://static.usrfiles.com/ugd/a44510_f15be3650e544952913f60af3b08b2ff.pdf
    • https://static.usrfiles.com/ugd/7a11b0_f1cc918b34644ffaac31b76e96383fe6.pdf
    • https://static.usrfiles.com/ugd/429b25_5a7b415503f34da8856a6299fbe84cc4.pdf
    • https://static.usrfiles.com/ugd/69695d_a1a9399fe557446e845851a2d3f44f4e.pdf
    • https://static.usrfiles.com/ugd/b88e3d_2ae9f8f475d84070bca13a72bf4cfaee.pdf
    • https://static.usrfiles.com/ugd/3b7182_10e4de352284439f96a1f9cc354c9bb9.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005780.bin
6fd3d1b1e33626f8d3d7fbaef145df33fc2a691a41e5b5befc4deae6f9b3f5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5780 4820 bytes
font_01_sfnt_off000067e9.bin
1607a76d1a755a33d85c7d5c1c2b22f9b7b3b26f29f1b81c6de63f7a371e12ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E9 10968 bytes
font_02_sfnt_off00008d11.bin
fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D11 16084 bytes

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